/* * Driver for Renesas R-Car VIN * * Copyright (C) 2016 Renesas Electronics Corp. * Copyright (C) 2011-2013 Renesas Solutions Corp. * Copyright (C) 2013 Cogent Embedded, Inc., * Copyright (C) 2008 Magnus Damm * * Based on the soc-camera rcar_vin driver * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include #include #include #include #include "rcar-vin.h" #define RVIN_DEFAULT_FORMAT V4L2_PIX_FMT_YUYV #define RVIN_MAX_WIDTH 2048 #define RVIN_MAX_HEIGHT 2048 /* ----------------------------------------------------------------------------- * Format Conversions */ static const struct rvin_video_format rvin_formats[] = { { .fourcc = V4L2_PIX_FMT_NV16, .bpp = 1, }, { .fourcc = V4L2_PIX_FMT_YUYV, .bpp = 2, }, { .fourcc = V4L2_PIX_FMT_UYVY, .bpp = 2, }, { .fourcc = V4L2_PIX_FMT_RGB565, .bpp = 2, }, { .fourcc = V4L2_PIX_FMT_XRGB555, .bpp = 2, }, { .fourcc = V4L2_PIX_FMT_XBGR32, .bpp = 4, }, }; const struct rvin_video_format *rvin_format_from_pixel(u32 pixelformat) { int i; for (i = 0; i < ARRAY_SIZE(rvin_formats); i++) if (rvin_formats[i].fourcc == pixelformat) return rvin_formats + i; return NULL; } static u32 rvin_format_bytesperline(struct v4l2_pix_format *pix) { const struct rvin_video_format *fmt; fmt = rvin_format_from_pixel(pix->pixelformat); if (WARN_ON(!fmt)) return -EINVAL; return pix->width * fmt->bpp; } static u32 rvin_format_sizeimage(struct v4l2_pix_format *pix) { if (pix->pixelformat == V4L2_PIX_FMT_NV16) return pix->bytesperline * pix->height * 2; return pix->bytesperline * pix->height; } /* ----------------------------------------------------------------------------- * V4L2 */ static void rvin_reset_crop_compose(struct rvin_dev *vin) { vin->crop.top = vin->crop.left = 0; vin->crop.width = vin->source.width; vin->crop.height = vin->source.height; vin->compose.top = vin->compose.left = 0; vin->compose.width = vin->format.width; vin->compose.height = vin->format.height; } static int rvin_reset_format(struct rvin_dev *vin) { struct v4l2_subdev_format fmt = { .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; struct v4l2_mbus_framefmt *mf = &fmt.format; int ret; fmt.pad = vin->src_pad_idx; ret = v4l2_subdev_call(vin_to_source(vin), pad, get_fmt, NULL, &fmt); if (ret) return ret; vin->format.width = mf->width; vin->format.height = mf->height; vin->format.colorspace = mf->colorspace; vin->format.field = mf->field; /* * If the subdevice uses ALTERNATE field mode and G_STD is * implemented use the VIN HW to combine the two fields to * one INTERLACED frame. The ALTERNATE field mode can still * be requested in S_FMT and be respected, this is just the * default which is applied at probing or when S_STD is called. */ if (vin->format.field == V4L2_FIELD_ALTERNATE && v4l2_subdev_has_op(vin_to_source(vin), video, g_std)) vin->format.field = V4L2_FIELD_INTERLACED; switch (vin->format.field) { case V4L2_FIELD_TOP: case V4L2_FIELD_BOTTOM: case V4L2_FIELD_ALTERNATE: vin->format.height /= 2; break; case V4L2_FIELD_NONE: case V4L2_FIELD_INTERLACED_TB: case V4L2_FIELD_INTERLACED_BT: case V4L2_FIELD_INTERLACED: break; default: vin->format.field = V4L2_FIELD_NONE; break; } rvin_reset_crop_compose(vin); return 0; } static int __rvin_try_format_source(struct rvin_dev *vin, u32 which, struct v4l2_pix_format *pix, struct rvin_source_fmt *source) { struct v4l2_subdev *sd; struct v4l2_subdev_pad_config *pad_cfg; struct v4l2_subdev_format format = { .which = which, }; enum v4l2_field field; int ret; sd = vin_to_source(vin); v4l2_fill_mbus_format(&format.format, pix, vin->digital.code); pad_cfg = v4l2_subdev_alloc_pad_config(sd); if (pad_cfg == NULL) return -ENOMEM; format.pad = vin->src_pad_idx; field = pix->field; ret = v4l2_subdev_call(sd, pad, set_fmt, pad_cfg, &format); if (ret < 0 && ret != -ENOIOCTLCMD) goto done; v4l2_fill_pix_format(pix, &format.format); pix->field = field; source->width = pix->width; source->height = pix->height; vin_dbg(vin, "Source resolution: %ux%u\n", source->width, source->height); done: v4l2_subdev_free_pad_config(pad_cfg); return ret; } static int __rvin_try_format(struct rvin_dev *vin, u32 which, struct v4l2_pix_format *pix, struct rvin_source_fmt *source) { const struct rvin_video_format *info; u32 rwidth, rheight, walign; /* Requested */ rwidth = pix->width; rheight = pix->height; /* Keep current field if no specific one is asked for */ if (pix->field == V4L2_FIELD_ANY) pix->field = vin->format.field; /* * Retrieve format information and select the current format if the * requested format isn't supported. */ info = rvin_format_from_pixel(pix->pixelformat); if (!info) { vin_dbg(vin, "Format %x not found, keeping %x\n", pix->pixelformat, vin->format.pixelformat); *pix = vin->format; pix->width = rwidth; pix->height = rheight; } /* Always recalculate */ pix->bytesperline = 0; pix->sizeimage = 0; /* Limit to source capabilities */ __rvin_try_format_source(vin, which, pix, source); switch (pix->field) { case V4L2_FIELD_TOP: case V4L2_FIELD_BOTTOM: case V4L2_FIELD_ALTERNATE: pix->height /= 2; source->height /= 2; break; case V4L2_FIELD_NONE: case V4L2_FIELD_INTERLACED_TB: case V4L2_FIELD_INTERLACED_BT: case V4L2_FIELD_INTERLACED: break; default: pix->field = V4L2_FIELD_NONE; break; } /* If source can't match format try if VIN can scale */ if (source->width != rwidth || source->height != rheight) rvin_scale_try(vin, pix, rwidth, rheight); /* HW limit width to a multiple of 32 (2^5) for NV16 else 2 (2^1) */ walign = vin->format.pixelformat == V4L2_PIX_FMT_NV16 ? 5 : 1; /* Limit to VIN capabilities */ v4l_bound_align_image(&pix->width, 2, RVIN_MAX_WIDTH, walign, &pix->height, 4, RVIN_MAX_HEIGHT, 2, 0); pix->bytesperline = max_t(u32, pix->bytesperline, rvin_format_bytesperline(pix)); pix->sizeimage = max_t(u32, pix->sizeimage, rvin_format_sizeimage(pix)); if (vin->chip == RCAR_M1 && pix->pixelformat == V4L2_PIX_FMT_XBGR32) { vin_err(vin, "pixel format XBGR32 not supported on M1\n"); return -EINVAL; } vin_dbg(vin, "Requested %ux%u Got %ux%u bpl: %d size: %d\n", rwidth, rheight, pix->width, pix->height, pix->bytesperline, pix->sizeimage); return 0; } static int rvin_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { struct rvin_dev *vin = video_drvdata(file); strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); strlcpy(cap->card, "R_Car_VIN", sizeof(cap->card)); snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", dev_name(vin->dev)); return 0; } static int rvin_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct rvin_dev *vin = video_drvdata(file); struct rvin_source_fmt source; return __rvin_try_format(vin, V4L2_SUBDEV_FORMAT_TRY, &f->fmt.pix, &source); } static int rvin_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct rvin_dev *vin = video_drvdata(file); struct rvin_source_fmt source; int ret; if (vb2_is_busy(&vin->queue)) return -EBUSY; ret = __rvin_try_format(vin, V4L2_SUBDEV_FORMAT_ACTIVE, &f->fmt.pix, &source); if (ret) return ret; vin->source.width = source.width; vin->source.height = source.height; vin->format = f->fmt.pix; rvin_reset_crop_compose(vin); return 0; } static int rvin_g_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct rvin_dev *vin = video_drvdata(file); f->fmt.pix = vin->format; return 0; } static int rvin_enum_fmt_vid_cap(struct file *file, void *priv, struct v4l2_fmtdesc *f) { if (f->index >= ARRAY_SIZE(rvin_formats)) return -EINVAL; f->pixelformat = rvin_formats[f->index].fourcc; return 0; } static int rvin_g_selection(struct file *file, void *fh, struct v4l2_selection *s) { struct rvin_dev *vin = video_drvdata(file); if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; switch (s->target) { case V4L2_SEL_TGT_CROP_BOUNDS: case V4L2_SEL_TGT_CROP_DEFAULT: s->r.left = s->r.top = 0; s->r.width = vin->source.width; s->r.height = vin->source.height; break; case V4L2_SEL_TGT_CROP: s->r = vin->crop; break; case V4L2_SEL_TGT_COMPOSE_BOUNDS: case V4L2_SEL_TGT_COMPOSE_DEFAULT: s->r.left = s->r.top = 0; s->r.width = vin->format.width; s->r.height = vin->format.height; break; case V4L2_SEL_TGT_COMPOSE: s->r = vin->compose; break; default: return -EINVAL; } return 0; } static int rvin_s_selection(struct file *file, void *fh, struct v4l2_selection *s) { struct rvin_dev *vin = video_drvdata(file); const struct rvin_video_format *fmt; struct v4l2_rect r = s->r; struct v4l2_rect max_rect; struct v4l2_rect min_rect = { .width = 6, .height = 2, }; if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; v4l2_rect_set_min_size(&r, &min_rect); switch (s->target) { case V4L2_SEL_TGT_CROP: /* Can't crop outside of source input */ max_rect.top = max_rect.left = 0; max_rect.width = vin->source.width; max_rect.height = vin->source.height; v4l2_rect_map_inside(&r, &max_rect); v4l_bound_align_image(&r.width, 2, vin->source.width, 1, &r.height, 4, vin->source.height, 2, 0); r.top = clamp_t(s32, r.top, 0, vin->source.height - r.height); r.left = clamp_t(s32, r.left, 0, vin->source.width - r.width); vin->crop = s->r = r; vin_dbg(vin, "Cropped %dx%d@%d:%d of %dx%d\n", r.width, r.height, r.left, r.top, vin->source.width, vin->source.height); break; case V4L2_SEL_TGT_COMPOSE: /* Make sure compose rect fits inside output format */ max_rect.top = max_rect.left = 0; max_rect.width = vin->format.width; max_rect.height = vin->format.height; v4l2_rect_map_inside(&r, &max_rect); /* * Composing is done by adding a offset to the buffer address, * the HW wants this address to be aligned to HW_BUFFER_MASK. * Make sure the top and left values meets this requirement. */ while ((r.top * vin->format.bytesperline) & HW_BUFFER_MASK) r.top--; fmt = rvin_format_from_pixel(vin->format.pixelformat); while ((r.left * fmt->bpp) & HW_BUFFER_MASK) r.left--; vin->compose = s->r = r; vin_dbg(vin, "Compose %dx%d@%d:%d in %dx%d\n", r.width, r.height, r.left, r.top, vin->format.width, vin->format.height); break; default: return -EINVAL; } /* HW supports modifying configuration while running */ rvin_crop_scale_comp(vin); return 0; } static int rvin_cropcap(struct file *file, void *priv, struct v4l2_cropcap *crop) { struct rvin_dev *vin = video_drvdata(file); struct v4l2_subdev *sd = vin_to_source(vin); if (crop->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; return v4l2_subdev_call(sd, video, g_pixelaspect, &crop->pixelaspect); } static int rvin_enum_input(struct file *file, void *priv, struct v4l2_input *i) { struct rvin_dev *vin = video_drvdata(file); struct v4l2_subdev *sd = vin_to_source(vin); int ret; if (i->index != 0) return -EINVAL; ret = v4l2_subdev_call(sd, video, g_input_status, &i->status); if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) return ret; i->type = V4L2_INPUT_TYPE_CAMERA; i->std = vin->vdev.tvnorms; if (v4l2_subdev_has_op(sd, pad, dv_timings_cap)) i->capabilities = V4L2_IN_CAP_DV_TIMINGS; strlcpy(i->name, "Camera", sizeof(i->name)); return 0; } static int rvin_g_input(struct file *file, void *priv, unsigned int *i) { *i = 0; return 0; } static int rvin_s_input(struct file *file, void *priv, unsigned int i) { if (i > 0) return -EINVAL; return 0; } static int rvin_querystd(struct file *file, void *priv, v4l2_std_id *a) { struct rvin_dev *vin = video_drvdata(file); struct v4l2_subdev *sd = vin_to_source(vin); return v4l2_subdev_call(sd, video, querystd, a); } static int rvin_s_std(struct file *file, void *priv, v4l2_std_id a) { struct rvin_dev *vin = video_drvdata(file); int ret; ret = v4l2_subdev_call(vin_to_source(vin), video, s_std, a); if (ret < 0) return ret; /* Changing the standard will change the width/height */ return rvin_reset_format(vin); } static int rvin_g_std(struct file *file, void *priv, v4l2_std_id *a) { struct rvin_dev *vin = video_drvdata(file); struct v4l2_subdev *sd = vin_to_source(vin); return v4l2_subdev_call(sd, video, g_std, a); } static int rvin_subscribe_event(struct v4l2_fh *fh, const struct v4l2_event_subscription *sub) { switch (sub->type) { case V4L2_EVENT_SOURCE_CHANGE: return v4l2_event_subscribe(fh, sub, 4, NULL); } return v4l2_ctrl_subscribe_event(fh, sub); } static int rvin_enum_dv_timings(struct file *file, void *priv_fh, struct v4l2_enum_dv_timings *timings) { struct rvin_dev *vin = video_drvdata(file); struct v4l2_subdev *sd = vin_to_source(vin); int pad, ret; pad = timings->pad; timings->pad = vin->sink_pad_idx; ret = v4l2_subdev_call(sd, pad, enum_dv_timings, timings); timings->pad = pad; return ret; } static int rvin_s_dv_timings(struct file *file, void *priv_fh, struct v4l2_dv_timings *timings) { struct rvin_dev *vin = video_drvdata(file); struct v4l2_subdev *sd = vin_to_source(vin); int ret; ret = v4l2_subdev_call(sd, video, s_dv_timings, timings); if (ret) return ret; vin->source.width = timings->bt.width; vin->source.height = timings->bt.height; vin->format.width = timings->bt.width; vin->format.height = timings->bt.height; return 0; } static int rvin_g_dv_timings(struct file *file, void *priv_fh, struct v4l2_dv_timings *timings) { struct rvin_dev *vin = video_drvdata(file); struct v4l2_subdev *sd = vin_to_source(vin); return v4l2_subdev_call(sd, video, g_dv_timings, timings); } static int rvin_query_dv_timings(struct file *file, void *priv_fh, struct v4l2_dv_timings *timings) { struct rvin_dev *vin = video_drvdata(file); struct v4l2_subdev *sd = vin_to_source(vin); return v4l2_subdev_call(sd, video, query_dv_timings, timings); } static int rvin_dv_timings_cap(struct file *file, void *priv_fh, struct v4l2_dv_timings_cap *cap) { struct rvin_dev *vin = video_drvdata(file); struct v4l2_subdev *sd = vin_to_source(vin); int pad, ret; pad = cap->pad; cap->pad = vin->sink_pad_idx; ret = v4l2_subdev_call(sd, pad, dv_timings_cap, cap); cap->pad = pad; return ret; } static int rvin_g_edid(struct file *file, void *fh, struct v4l2_edid *edid) { struct rvin_dev *vin = video_drvdata(file); struct v4l2_subdev *sd = vin_to_source(vin); int input, ret; if (edid->pad) return -EINVAL; input = edid->pad; edid->pad = vin->sink_pad_idx; ret = v4l2_subdev_call(sd, pad, get_edid, edid); edid->pad = input; return ret; } static int rvin_s_edid(struct file *file, void *fh, struct v4l2_edid *edid) { struct rvin_dev *vin = video_drvdata(file); struct v4l2_subdev *sd = vin_to_source(vin); int input, ret; if (edid->pad) return -EINVAL; input = edid->pad; edid->pad = vin->sink_pad_idx; ret = v4l2_subdev_call(sd, pad, set_edid, edid); edid->pad = input; return ret; } static const struct v4l2_ioctl_ops rvin_ioctl_ops = { .vidioc_querycap = rvin_querycap, .vidioc_try_fmt_vid_cap = rvin_try_fmt_vid_cap, .vidioc_g_fmt_vid_cap = rvin_g_fmt_vid_cap, .vidioc_s_fmt_vid_cap = rvin_s_fmt_vid_cap, .vidioc_enum_fmt_vid_cap = rvin_enum_fmt_vid_cap, .vidioc_g_selection = rvin_g_selection, .vidioc_s_selection = rvin_s_selection, .vidioc_cropcap = rvin_cropcap, .vidioc_enum_input = rvin_enum_input, .vidioc_g_input = rvin_g_input, .vidioc_s_input = rvin_s_input, .vidioc_dv_timings_cap = rvin_dv_timings_cap, .vidioc_enum_dv_timings = rvin_enum_dv_timings, .vidioc_g_dv_timings = rvin_g_dv_timings, .vidioc_s_dv_timings = rvin_s_dv_timings, .vidioc_query_dv_timings = rvin_query_dv_timings, .vidioc_g_edid = rvin_g_edid, .vidioc_s_edid = rvin_s_edid, .vidioc_querystd = rvin_querystd, .vidioc_g_std = rvin_g_std, .vidioc_s_std = rvin_s_std, .vidioc_reqbufs = vb2_ioctl_reqbufs, .vidioc_create_bufs = vb2_ioctl_create_bufs, .vidioc_querybuf = vb2_ioctl_querybuf, .vidioc_qbuf = vb2_ioctl_qbuf, .vidioc_dqbuf = vb2_ioctl_dqbuf, .vidioc_expbuf = vb2_ioctl_expbuf, .vidioc_prepare_buf = vb2_ioctl_prepare_buf, .vidioc_streamon = vb2_ioctl_streamon, .vidioc_streamoff = vb2_ioctl_streamoff, .vidioc_log_status = v4l2_ctrl_log_status, .vidioc_subscribe_event = rvin_subscribe_event, .vidioc_unsubscribe_event = v4l2_event_unsubscribe, }; /* ----------------------------------------------------------------------------- * File Operations */ static int rvin_power_on(struct rvin_dev *vin) { int ret; struct v4l2_subdev *sd = vin_to_source(vin); pm_runtime_get_sync(vin->v4l2_dev.dev); ret = v4l2_subdev_call(sd, core, s_power, 1); if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) return ret; return 0; } static int rvin_power_off(struct rvin_dev *vin) { int ret; struct v4l2_subdev *sd = vin_to_source(vin); ret = v4l2_subdev_call(sd, core, s_power, 0); pm_runtime_put(vin->v4l2_dev.dev); if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) return ret; return 0; } static int rvin_initialize_device(struct file *file) { struct rvin_dev *vin = video_drvdata(file); int ret; struct v4l2_format f = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, .fmt.pix = { .width = vin->format.width, .height = vin->format.height, .field = vin->format.field, .colorspace = vin->format.colorspace, .pixelformat = vin->format.pixelformat, }, }; ret = rvin_power_on(vin); if (ret < 0) return ret; pm_runtime_enable(&vin->vdev.dev); ret = pm_runtime_resume(&vin->vdev.dev); if (ret < 0 && ret != -ENOSYS) goto eresume; /* * Try to configure with default parameters. Notice: this is the * very first open, so, we cannot race against other calls, * apart from someone else calling open() simultaneously, but * .host_lock is protecting us against it. */ ret = rvin_s_fmt_vid_cap(file, NULL, &f); if (ret < 0) goto esfmt; v4l2_ctrl_handler_setup(&vin->ctrl_handler); return 0; esfmt: pm_runtime_disable(&vin->vdev.dev); eresume: rvin_power_off(vin); return ret; } static int rvin_open(struct file *file) { struct rvin_dev *vin = video_drvdata(file); int ret; mutex_lock(&vin->lock); file->private_data = vin; ret = v4l2_fh_open(file); if (ret) goto unlock; if (!v4l2_fh_is_singular_file(file)) goto unlock; if (rvin_initialize_device(file)) { v4l2_fh_release(file); ret = -ENODEV; } unlock: mutex_unlock(&vin->lock); return ret; } static int rvin_release(struct file *file) { struct rvin_dev *vin = video_drvdata(file); bool fh_singular; int ret; mutex_lock(&vin->lock); /* Save the singular status before we call the clean-up helper */ fh_singular = v4l2_fh_is_singular_file(file); /* the release helper will cleanup any on-going streaming */ ret = _vb2_fop_release(file, NULL); /* * If this was the last open file. * Then de-initialize hw module. */ if (fh_singular) { pm_runtime_suspend(&vin->vdev.dev); pm_runtime_disable(&vin->vdev.dev); rvin_power_off(vin); } mutex_unlock(&vin->lock); return ret; } static const struct v4l2_file_operations rvin_fops = { .owner = THIS_MODULE, .unlocked_ioctl = video_ioctl2, .open = rvin_open, .release = rvin_release, .poll = vb2_fop_poll, .mmap = vb2_fop_mmap, .read = vb2_fop_read, }; void rvin_v4l2_remove(struct rvin_dev *vin) { v4l2_info(&vin->v4l2_dev, "Removing %s\n", video_device_node_name(&vin->vdev)); /* Checks internaly if handlers have been init or not */ v4l2_ctrl_handler_free(&vin->ctrl_handler); /* Checks internaly if vdev have been init or not */ video_unregister_device(&vin->vdev); } static void rvin_notify(struct v4l2_subdev *sd, unsigned int notification, void *arg) { struct rvin_dev *vin = container_of(sd->v4l2_dev, struct rvin_dev, v4l2_dev); switch (notification) { case V4L2_DEVICE_NOTIFY_EVENT: v4l2_event_queue(&vin->vdev, arg); break; default: break; } } int rvin_v4l2_probe(struct rvin_dev *vin) { struct video_device *vdev = &vin->vdev; struct v4l2_subdev *sd = vin_to_source(vin); int pad_idx, ret; v4l2_set_subdev_hostdata(sd, vin); vin->v4l2_dev.notify = rvin_notify; ret = v4l2_subdev_call(sd, video, g_tvnorms, &vin->vdev.tvnorms); if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) return ret; if (vin->vdev.tvnorms == 0) { /* Disable the STD API if there are no tvnorms defined */ v4l2_disable_ioctl(&vin->vdev, VIDIOC_G_STD); v4l2_disable_ioctl(&vin->vdev, VIDIOC_S_STD); v4l2_disable_ioctl(&vin->vdev, VIDIOC_QUERYSTD); v4l2_disable_ioctl(&vin->vdev, VIDIOC_ENUMSTD); } /* Add the controls */ /* * Currently the subdev with the largest number of controls (13) is * ov6550. So let's pick 16 as a hint for the control handler. Note * that this is a hint only: too large and you waste some memory, too * small and there is a (very) small performance hit when looking up * controls in the internal hash. */ ret = v4l2_ctrl_handler_init(&vin->ctrl_handler, 16); if (ret < 0) return ret; ret = v4l2_ctrl_add_handler(&vin->ctrl_handler, sd->ctrl_handler, NULL); if (ret < 0) return ret; /* video node */ vdev->fops = &rvin_fops; vdev->v4l2_dev = &vin->v4l2_dev; vdev->queue = &vin->queue; strlcpy(vdev->name, KBUILD_MODNAME, sizeof(vdev->name)); vdev->release = video_device_release_empty; vdev->ioctl_ops = &rvin_ioctl_ops; vdev->lock = &vin->lock; vdev->ctrl_handler = &vin->ctrl_handler; vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | V4L2_CAP_READWRITE; vin->src_pad_idx = 0; for (pad_idx = 0; pad_idx < sd->entity.num_pads; pad_idx++) if (sd->entity.pads[pad_idx].flags == MEDIA_PAD_FL_SOURCE) break; if (pad_idx >= sd->entity.num_pads) return -EINVAL; vin->src_pad_idx = pad_idx; vin->sink_pad_idx = 0; for (pad_idx = 0; pad_idx < sd->entity.num_pads; pad_idx++) if (sd->entity.pads[pad_idx].flags == MEDIA_PAD_FL_SINK) { vin->sink_pad_idx = pad_idx; break; } vin->format.pixelformat = RVIN_DEFAULT_FORMAT; rvin_reset_format(vin); ret = video_register_device(&vin->vdev, VFL_TYPE_GRABBER, -1); if (ret) { vin_err(vin, "Failed to register video device\n"); return ret; } video_set_drvdata(&vin->vdev, vin); v4l2_info(&vin->v4l2_dev, "Device registered as %s\n", video_device_node_name(&vin->vdev)); return ret; }